TANZANIA - L. VICTORIA WATERS, ANNUAL CATCHES (m.t.) BY SPECIES, 1975–1985*
SPECIES | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 |
O. esculentus | 3592 | 1256 | 1564 | 962 | 1997 | 1875 | 4422 | 1997 | 916 | ||
O. niloticus | - | 1031 | 1645 | 2968 | 1608 | 4210 | 3929 | 3336 | 1887 | ||
O. variabilis | 1850 | 1245 | 1944 | 2279 | 3857 | 4476 | 4418 | 5187 | 3901 | 8821 | 10651 |
O. leucostictus | - | - | - | - | - | - | - | - | - | ||
T. zillii | 207 | 114 | 172 | 143 | 95 | 200 | 492 | 123 | 49 | ||
Bagrus | 5827 | 5906 | 4570 | 5114 | 5183 | 4143 | 12180 | 11700 | 11601 | 8892 | 9215 |
Lates | - | - | - | 24 | - | 15 | 274 | 2040 | 16425 | 41614 | 37608 |
Protopterus | 6180 | 3100 | 7243 | 4029 | 4603 | 6129 | 7080 | 2948 | 3705 | 3963 | 4050 |
Haplochromis | 16148 | 25184 | 36158 | 18810 | 21760 | 25036 | 24593 | 24023 | 21624 | 15122 | 11572 |
Clarias | 2508 | 1980 | 2622 | 2869 | 2558 | 4108 | 2934 | 2719 | 2528 | 5374 | 5560 |
Barbus | 232 | 161 | 153 | 129 | 364 | 256 | 216 | 291 | 849 | 649 | 402 |
Synodontis | 2295 | 3166 | 3152 | 2270 | 4334 | 8661 | 1938 | 2523 | 2978 | 5184 | 9278 |
Mormyrus | 80 | 88 | 106 | 99 | 408 | 315 | 163 | 130 | 197 | 653 | 353 |
Labeo | 1601 | 3611 | 736 | 2309 | 6849 | 3456 | 1638 | 1606 | 923 | 1135 | 544 |
Schilbe | 1015 | 1373 | 2771 | 1216 | 1638 | 1704 | 2624 | 3113 | 2317 | 4423 | 1577 |
Rastrineobola/Other spp. | 5058 | 2369 | 2513 | 3289 | 2661 | 2899 | 3720 | 2259 | 3187 | 1961 | 8096 |
TOTAL | 46593 | 50584 | 65349 | 46510 | 57915 | 67483 | 70621 | 63995 | 73087 | 97818 | 98906 |
TANZANIA - L. VICTORIA WATERS, NUMBER OF FISHERMEN & VESSELS, CATCH & EFFORT LEVELS, 1970–1985. *
YEAR | FISHERMEN | VESSELS | CATCH (t.) | CPUE (t/boats) |
1970 | 12091 | 3785 | 48292 | 12.76 |
1971 | 14131 | 3302 | 42552 | 12.87 |
1972 | 14690 | 3494 | 40926 | 11.71 |
1973 | 15917 | 3976 | 49615 | 12.48 |
1974 | 13381 | 3332 | 41526 | 12.46 |
1975 | 15037 | 3918 | 46602 | 11.89 |
1976 | 14733 | 3794 | 48250 | 12.72 |
1977 | 14327 | 3398 | 65415 | 19.25 |
1978 | 17654 | 3448 | 46553 | 13.50 |
1979 | 20937 | 4457 | 57517 | 12.90 |
1980 | 20587 | 3997 | 67483 | 16.88 |
1981 | 20787 | 4199 | 70621 | 16.82 |
1982 | 18263 | 4245 | 63996 | 15.08 |
1983 | 15194 | 4141 | 73087 | 17.65 |
1984 | 17827 | 4650 | 97818 | 21.04 |
1985 | 17556 | 4160 | 98906 | 23.78 |
TANZANIA - L. VICTORIA WATERS, GEAR & EQUIPMENT ENUMERATIONS, MWANZA REGION, 1970–1986.*
YEAR | GILLNETS | BEACH SEINES | DAGAA SEINES | HOOKS | O/B ENGINES | I/B ENGINES | TRAWLERS |
1970 | 59403 | 200 | ** | 72596 | ** | ** | ** |
1971 | 63053 | 86 | 68 | 5253 | ** | ** | ** |
1972 | 60929 | 170 | 126 | 105450 | ** | ** | ** |
1973 | 59299 | 224 | 109 | 101770 | 60 | ** | ** |
1974 | 47408 | 171 | 147 | 85856 | 63 | ** | (5) |
1975 | 65804 | 211 | 113 | 103833 | 75 | 1 | (5) |
1976 | 97155 | 289 | 90 | 120459 | ** | ** | (5) |
1977 | 89396 | 362 | 204 | 90922 | 106 | 6 | (5) |
1978 | 67786 | 234 | 221 | 149302 | 31 | 3 | (5) |
1979 | 95477 | 271 | 469 | 157072 | ** | 7 | (5) |
1980 | 125103 | 86 | 583 | 179178 | 113 | 4 | (5) |
1981 | 139689 | 283 | 322 | 201457 | ** | ** | (9) |
1982 | 86827 | 284 | 262 | 181668 | 117 | 7 | 13 |
1983 | 57912 | 284 | 252 | 170219 | 35 | 1 | 15 |
1984 | 69105 | 344 | 230 | 303781 | 41 | 4 | 17 |
1985 | 47537 | 378 | 207 | 235089 | 46 | 20 | 17 |
1986 | 111843 | 621 | 336 | 189671 | 68 | 24 | 18 |
* SOURCE: Regional Fisheries Office, Mwanza
** Indicates no data available. Figures in brackets are estimates derived from other sources (Goudswaard 1987; Goudswaard & Ligtvoet 1987).,/A.
TANZANIA - L. VICTORIA WATERS (MARA REGION), MEAN PRICES TO FISHERMEN BY SPECIES 1976–1986 (current Tshs/kg).*
SPECIES | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 |
O. esculentus | 2.58 | 3.55 | 3.88 | 3.93 | ** | 8.50 | 10.20 | 9.10 | - | 18.30 | 24.50 |
O. niloticus | 3.01 | 4.52 | 4.03 | 5.93 | ** | 14.40 | 23.80 | 20.50 | 15.70 | 21.20 | 25.00 |
O. variabilis | 2.50 | 3.37 | 5.58 | 5.86 | ** | 8.00 | 16.90 | 15.60 | 15.70 | 15.80 | 18.90 |
T.zillii | 1.32 | 2.00 | 3.11 | 5.64 | ** | 9.30 | 25.00 | 14.00 | - | 10.20 | 12.50 |
Bagrus | 1.78 | 2.23 | 3.09 | 2.99 | ** | 8.70 | 9.40 | 11.00 | 16.60 | 12.80 | 13.50 |
Lates | - | - | 1.00 | - | ** | 15.00 | 13.40 | 10.90 | 12.20 | 9.80 | 11.70 |
Protopterus | 1.60 | 1.70 | 1.81 | 2.65 | ** | 5.40 | 7.90 | 9.20 | 11.80 | 10.50 | 16.70 |
Haplochromis | 0.99 | 1.17 | 1.26 | 1.63 | ** | 3.20 | 4.90 | 4.90 | 6.20 | 4.20 | 6.30 |
Clarias | 1.40 | 1.77 | 2.02 | 2.37 | ** | 6.60 | 9.50 | 10.50 | 11.30 | 11.50 | 15.50 |
Barbus | 1.72 | 3.37 | 2.65 | 4.63 | ** | 6.10 | 30.70 | 18.98 | 10.50 | 21.80 | 24.30 |
Synodontis | 0.98 | 1.08 | 1.42 | 1.70 | ** | 5.20 | 5.60 | 9.90 | 10.70 | 9.90 | 3.20 |
Mormyrus | 1.00 | 1.25 | 2.38 | 2.95 | ** | 1.40 | 6.60 | 6.40 | 11.10 | 7.90 | 16.50 |
Labeo | 2.40 | 2.49 | 2.74 | 3.46 | ** | 7.00 | 8.40 | 10.60 | 17.80 | 12.20 | 15.70 |
Schilbe | 1.11 | 1.54 | 1.69 | 2.33 | ** | 5.70 | 7.60 | 8.90 | 12.10 | 10.20 | 14.10 |
TOTAL | 1.72 | 2.31 | 2.62 | 3.54 | ** | 7.46 | 12.85 | 11.46 | 12.64 | 12.59 | 15.60 |
* SOURCES: Annual Reports, Regional Fisheries Office, Mara
** No data available
TANZANIA - L. VICTORIA WATERS (MWANZA REGION), MEAN PRICES TO FISHERMEN BY SPECIES 1983–1986 (current Tshs/kg).*
SPECIES | 1983 | 1984 | 1985 | 1986 |
O. esculentus | 14.10 | 11.40 | 24.90 | 29.30 |
O. niloticus | 16.40 | 30.10 | 22.80 | 28.80 |
O. variabilis | 12.50 | 21.80 | 20.20 | 22.40 |
T. zillii | 11.70 | 17.40 | 30.40 | 27.50 |
Alestes | 10.30 | 5.10 | ** | 9.50 |
Bagrus | 12.10 | 13.40 | 18.30 | 22.60 |
Lates | 9.90 | 13.30 | 11.90 | 15.30 |
Protopterus | 7.00 | 8.80 | 16.20 | 22.50 |
Haplochromis | 5.00 | 6.30 | 8.90 | 5.90 |
Clarias | 11.00 | 14.20 | 15.70 | 18.10 |
Barbus | 12.20 | 9.10 | 20.00 | 31.40 |
Synodontis | 8.60 | 9.60 | 15.00 | 11.80 |
Mormyrus | 9.40 | 11.20 | 18.00 | 12.40 |
Labeo | 10.20 | 14.50 | 8.10 | 9.80 |
Schilbe | 11.90 | 10.70 | 14.50 | 16.70 |
Rastrineobola/Other spp. | 7.10 | 15.00 | 11.60 | 11.50 |
TOTAL | 10.59 | 13.24 | 17.10 | 18.47 |
* SOURCES: Annual Reports, Regional Fisheries Office, Mwanza
** Data Uncertain
TANZANIA - L. VICTORIA WATERS (MWANZA REGION), EXPORTS OF FISH PRODUCTS, 1985.*
DESTINATION | DAGAA | BAGRUS | HAPLOCHROMIS | SYNODONTIS | PROTOPTERUS | LATES | TOTAL | |||||||
wt. | value | wt. | value | wt. | value | wt. | value | wt. | value | wt. | value | wt. | value | |
DAR | 371.5 | 7484.0 | 14.2 | 669.2 | 35.1 | 776.0 | .4 | 18.0 | -- | -- | 62.7 | 3919.9 | 483.9 | 2867.1 |
IRINGA | 170.7 | 2513.6 | -- | -- | -- | -- | -- | -- | -- | -- | .4 | 22.0 | 171.0 | 2535.6 |
SONGEA/RUVUMA | 321.0 | 6420.0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 321.0 | 6420.0 |
TANGA | 52.4 | 1048.0 | .1 | 6.0 | -- | -- | -- | -- | -- | -- | -- | -- | 52.5 | 1054.0 |
SHINYANGA | 11.4 | 227.2 | .2 | 10.5 | .1 | 8.0 | 1.4 | 67.5 | -- | -- | 4.2 | 263.2 | 17.3 | 576.4 |
KIGOMA | 235.8 | 4616.8 | .4 | 21.9 | .03 | 2.0 | -- | -- | -- | -- | 3.7 | 231.4 | 240.0 | 4872.1 |
DODOMA | 47.4 | 948.8 | .6 | 49.9 | .4 | 23.7 | -- | -- | -- | -- | 10.9 | 682.9 | 59.3 | 1705.3 |
MBEYA | 35.9 | 717.6 | .5 | 24.0 | 16.5 | 228.0 | 7.5 | 376.0 | -- | -- | 1.9 | 116.5 | 62.2 | 1462.1 |
MOROGORO | 181.4 | 2628.0 | .4 | 18.0 | .2 | 3.3 | .5 | 22.5 | -- | -- | 10.5 | 670.0 | 193.0 | 3341.8 |
TABORA | 71.8 | 1435.2 | .6 | 27.0 | .4 | 17.8 | .6 | 31.5 | -- | -- | 6.2 | 357.9 | 79.6 | 1869.4 |
RUKWA/MPANDA | .4 | 7.2 | .03 | 1.5 | .03 | 2.0 | .7 | 34.5 | -- | -- | 7.3 | 459.2 | 8.5 | 504.4 |
MARA | 10.1 | 202.4 | -- | -- | .6 | 9.9 | -- | -- | 1.0 | 15.0 | .03 | 1.5 | 11.8 | 228.8 |
BUKOBA | 145.4 | 2908.0 | .6 | 27.0 | -- | -- | .5 | 24.4 | -- | -- | 2.9 | 183.0 | 149.4 | 3142.4 |
MTWARA/LINDI | 170.7 | 3812.6 | -- | -- | -- | -- | .1 | 4.5 | -- | -- | .3 | 15.0 | 171.1 | 3832.1 |
ARUSHA | 43.8 | 876.8 | -- | -- | -- | -- | -- | -- | -- | -- | 9.1 | 576.4 | 52.9 | 1453.2 |
TOTAL | 1869.6 | 35846.2 | 17.6 | 855.0 | 53.3 | 1070.7 | 1.6 | 578.9 | 1.0 | 15.0 | 120.2 | 7498.8 | 2073.4 | 45364.7 |
* SOURCE: Regional Fisheries Office, Mwanza.
NOTE: Weights are in metric tons; values are TShs'000. Figures may not sum exactly due to rounding.
TANZANIA - L. VICTORIA WATERS (MARA REGION), VALUE OF CATCH BY FISH SPECIES (TSHS '000) 1976–1986.*
SPECIES | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 |
O. esculentus | 922 | 1223.7 | 995.0 | 2098.5 | ** | 7359.8 | 4209.9 | 348.5 | 8.5 | 241.1 | 12972.8 |
O. niloticus | 283 | 413.3 | 1657.5 | 2381.9 | ** | 3388.8 | 13405.5 | 2615.8 | 11998.4 | 33152.0 | 111105.5 |
O. variabilis | 1163 | 1858.3 | 1453.7 | 5520.5 | ** | 5991.8 | 38939.6 | 21401.2 | 25389.6 | 21015.2 | 5581.1 |
T. zillii | 25 | 10.8 | 27.4 | 201.4 | ** | 100.1 | 271.3 | 105.0 | 12.3 | 927.5 | 5.0 |
Bagrus | 2526 | 2256.7 | 5141.0 | 2154.9 | ** | 5866.6 | 4264.4 | 3922.8 | 8921.6 | 10047.8 | 1879.0 |
Lates | - | - | 9.1 | - | ** | 2623.0 | 34301.0 | 68572.4 | 20740.3 | 94501.1 | 114525.4 |
Protopterus | 812 | 1222.6 | 1127.2 | 2447.6 | ** | 2379.2 | 3868.9 | 1517.5 | 2144.7 | 3053.1 | 4110.5 |
Haplochromis | 4775 | 6094.7 | 6112.6 | 5081.5 | ** | 12354.6 | 10941.1 | 13001.3 | 6485.6 | 10444.6 | 1390.6 |
Clarias | 540 | 695.5 | 1074.3 | 1765.9 | ** | 2798.7 | 4971.3 | 2087.1 | 4323.0 | 4350.6 | 6796.3 |
Barbus | 92 | 104.7 | 172.7 | 149.0 | ** | 196.5 | 3286.7 | 736.3 | 118.3 | 113.3 | 63.2 |
Synodontis | 466 | 834.1 | 705.1 | 923.2 | ** | 1484.3 | 1466.8 | 6065.0 | 15822.1 | 4290.9 | 1583.0 |
Mormyrus | 17 | 38.7 | 39.7 | 103.8 | ** | 89.8 | 269.5 | 263.2 | 376.1 | 167.0 | 90.7 |
Labeo | 626 | 1024.6 | 2247.0 | 3817.1 | ** | 2580.8 | 2161.5 | 2117.2 | 3311.1 | 193.4 | 23.5 |
Schilbe | 687 | 1251.1 | 1193.4 | 1327.0 | ** | 2313.8 | 4989.6 | 6348.9 | 12934.3 | 4206.2 | 3711.5 |
TOTAL | 13934 | 17028.8 | 21955.7 | 27972.3 | ** | 49527.8 | 127347.1 | 129102.2 | 112585.9 | 186703.8 | 263838.1 |
* SOURCES: Annual Reports, Regional Fisheries Office, Mara.
** No data available.
TANZANIA - L.VICTORIA WATERS, ILLUSTRATIVE ANNUAL COST AND EARNINGS FOR NON-MOTORISED NILE PERCH CANOE FISHING UNIT (Tsh. July 1987)
ITEM | RATE | TSHS. | TOTAL |
EQUIPMENT & GEAR INVESTMENT:1 | |||
CANOE | 35 000 | ||
NETS (20) | Shs.2500. Ea. | 50 000 | 85 000 |
GROSS REVENUE:2 | |||
TOTAL ANNUAL CATCH | 16,500 kg | ||
GROSS ANNUAL REVENUE | Shs.20/kg | 330 000 | 330 000 |
OPERATING COSTS:3 | |||
TOTAL ANNUAL WEIGHT CREW FISH | 825 kg | ||
@ TOTAL ANNUAL COST | Shs.20/kg | -16 500 | |
TOTAL ANNUAL COST OTHER CREW FOOD | -27 500 | ||
ANNUAL CREW CATCH SHARE | 25% | -82 500 | |
MAINTENANCE REPLACEMENT (DEPRECIATION) | 20% Investment | -17 000 | |
NETS (1 year) | Shs.2 500 Ea. | -50 000 | |
CANOE (4 years) | Shs.8750/year | -8 750 | -202 250 |
MANAGEMENT OPPORTUNITY COST:4 | Shs.15600/year | -15 600 | -15 600 |
NET REVENUE:5 | |||
RETURN TO CAPITAL | 112 150 | ||
RATE OF RETURN ON INVESTMENT | 132% | 127 750 | |
NET REVENUE TO OWNER | 127 750 | ||
TOTAL REVENUE TO A CREW MEMBER | 31 625 | ||
(AS PERCENTAGE OF MINIMUM WAGE) | 203% |
NOTES
TANZANIA - L.VICTORIA WATERS, ILLUSTRATIVE ANNUAL COST AND EARNINGS FOR MOTORISED NILE PERCH CANOE FISHING UNIT (Tsh. July 1987)
ITEM | RATE | TSHS. | TOTAL |
EQUIPMENT & GEAR INVESTMENT:1 | |||
CANOE | 70 000 | ||
ENGINE | 175 000 | ||
NETS (50) | Shs.2500. Ea. | 125 000 | 370 000 |
GROSS REVENUE:2 | |||
TOTAL ANNUAL CATCH | 41 250 kg | ||
GROSS ANNUAL REVENUE | Shs.20/kg | 825 000 | 825 000 |
OPERATING COSTS:3 | |||
TOTAL ANNUAL WEIGHT CREW FISH | 825 kg | ||
@ TOTAL ANNUAL COST | Shs.20/kg | -16 500 | |
TOTAL ANNUAL COST OTHER CREW FOOD | -27 500 | ||
ANNUAL CREW CATCH SHARE | 17.5% | -144 375 | |
ANNUAL FUEL AND OIL COST | -321 750 | ||
MAINTENANCE REPLACEMENT (DEPRECIATION) | 20% Investment | -74 000 | |
NETS (1 year) | Shs.2 500 Ea. | -125 000 | |
ENGINE (6 years) | Shs.29 167/y | -29 167 | |
CANOE (4 years) | Shs.17500/y | -17 500 | -755 792 |
MANAGEMENT OPPORTUNITY COST:4 | Shs.31200/y | -31 200 | -31 200 |
NET REVENUE:5 | |||
RETURN TO CAPITAL | 38 008 | ||
RATE OF RETURN ON INVESTMENT | 10% | ||
NET REVENUE TO OWNER | 69 208 | ||
TOTAL REVENUE TO A CREW MEMBER | 37 675 | ||
(AS PERCENTAGE OF MINIMUM WAGE) | 242% |
NOTES
2. Gross Revenue
Catch rate, fishing days, and beach price for Nile perch as in Table 3.10.
ESTIMATES OF STANDING STOCKS OF MAJOR FISH SPECIES BY COUNTRY
(1968–1971, in tonnes)
Kenya | Tanzania | Uganda | All areas | ||
Species: | % | ||||
Haplochromis spp 1 | 36 694 | 321 282 | 205 592 | 563 568 | 83.00 |
O. esculentus | 636 | 9 569 | 1 624 | 11 829 | 1.74 |
O. variabilis | 12 | 88 | 376 | 476 | 0.07 |
O. niloticus | 48 | 912 | 535 | 1 495 | 0.22 |
T. zillii | - | 6 | 53 | 59 | 0.01 |
O. leucostictus | - | - | 29 | 29 | 0.00 |
Bagrus docmac | 2 788 | 22 131 | 14 766 | 39 685 | 5.84 |
Clarias mossambicus | 1 936 | 14 138 | 10 885 | 26 959 | 3.97 |
Xenoclarias spp | 65 | 144 | 238 | 447 | 0.07 |
Protopterus aethiopicus | 896 | 5 022 | 3 625 | 9 543 | 1.41 |
Lates niloticus | 93 | 7 | 302 | 402 | 0.06 |
Synodontis victoriae | 309 | 13 256 | 9 644 | 23 209 | 3.42 |
S. afrofischeri | 42 | - | 9 | 51 | 0.01 |
Barbus altianalis | 21 | 77 | 155 | 213 | 0.03 |
Labeo victorianus | 14 | 53 | 1 | 68 | 0.01 |
Mormyrus kannume | 28 | 119 | 181 | 328 | 0.05 |
Schilbe mystus | 45 | 547 | 54 | 646 | 0.10 |
Total | 43 627 | 387 351 | 248 029 | 679 007 | 100.01 |
Area (ha) | 416 730 | 3 767 490 | 3 139 890 | 7 324 110 | |
Density (kg/ha) | 104.7 | 102.8 | 79.0 | 92.7 |
1 Based on hauls made with small-meshed (38 and 19 mm stretched mesh) codends.
Source : FAO (1973)
QUANTITY VALUE OF FISH LANDED BY LAKE REGION, 1970–1981 FRESH WATER FISH
Lake Victoria | Lake Albert | Lake Kyoga | Lake Edward and George | Lake Wamala | Albert Nile | Other waters | TOTALS | |
FISH CATCH (1 000 tonnes) | ||||||||
1971 | 38.1 | 9.5 | 89.7 | 11.7 | 5.2 | 4.2 | 3.9 | 162.3 |
1972 | 33.9 | 10.4 | 95.1 | 12.3 | 4.1 | 4.3 | 4.0 | 164.1 |
1973 | 32.5 | 13.0 | 100.5 | 11.0 | 4.3 | 4.2 | 4.0 | 169.5 |
1974 | 24.5 | 13.5 | 105.0 | 10.5 | 6.5 | 4.0 | 3.5 | 167.5 |
1975 | 16.9 | 18.7 | 118.7 | 13.2 | 6.3 | 7.1 | 6.8 | 173.2 |
1976 | 11.1 | 12.3 | 145.8 | 12.5 | 4.3 | 4.5 | 2.1 | 192.6 |
1977 | 15.7 | 20.6 | 167.0 | 12.0 | 1.1 | 1.8 | 1.3 | 219.5 |
1978 | 14.2 | 20.6 | 167.0 | 11.8 | 1.8 | 5.7 | 1.1 | 223.3 |
1979 | 12.0 | 17.0 | 133.0 | 9.6 | 2.0 | 4.5 | 1.8 | 179.9 |
1980 | 10.0 | 13.0 | 131.0 | 7.0 | 1.0 | 3.2 | 0.7 | 165.9 |
1981 | 17.0 | 6.0 | 130.0 | 5.0 | 3.8 | 3.0 | 3.0 | 167.8 |
1982 | 13.0 | 10.0 | 138.0 | 6.9 | 0.5 | 1.0 | 0.6 | 170.0 |
Source : Uganda Ministry of Animal Industry and Fisheries, 1983
UGANDA - L. VICTORIA WATERS
ANNUAL CATCHES BY SPECIES
1975–1982
Catch and % by species | |||||||||||||
Species | 1975 | 1976 | 1977 | 1978 | 1979 | 1980a | 1981a | 1982a | |||||
O. esculentus | 70 | (0.5) | 50 | (0.5) | 760 | (4.9) | 760 | (4.9) | 180 | (1.1) | |||
O. niloticus | 5 890 | (38.0) | 1 300 | (11.7) | 1 100 | (7.1) | 1 100 | (7.1) | 750 | (4.5) | 19 700 | 6 300 | 4 300 |
O. variabilis | 860 | (5.5) | 400 | (3.6) | 980 | (6.3) | 970 | (6.2) | 570 | (3.4) | |||
O. leucostietus | 130 | (0.8) | 60 | (0.5) | 140 | (0.9) | 140 | (0.9) | - | ||||
T. zillii | 50 | (0.3) | 40 | (0.4) | 130 | (0.8) | 130 | (0.8) | 150 | (0.9) | |||
Bagrus | 2 930 | (18.9) | 4 380 | (39.5) | 4 910 | (31.5) | 4 900 | (31.5) | 6 530 | (39.0) | |||
Lates | 250 | (1.6) | 540 | (4.9) | 460 | (2.9) | 460 | (3.0) | 190 | (1.1) | 5 600 | 16 500 | 20 340 |
Protopterus | 195 | (12.6) | 1 800 | (16.2) | 2 270 | (14.6) | 2 300 | (14.8) | 1 370 | (8.2) | |||
Haplochromis | 1 690 | (10.9) | 1 000 | (9.0) | 1 560 | (10.0) | 1 560 | (10.0) | 1 550 | (9.2) | |||
Clarias | 1 290 | (8.3) | 1 320 | (11.9) | 1 920 | (12.3) | 1 900 | (12.2) | 2 330 | (13.9) | |||
Barbus | 260 | (1.4) | 130 | (1.2) | 530 | (3.4) | 530 | (3.4) | 360 | (2.1) | |||
Synodontis | 70 | (0.5) | 40 | (0.4) | 570 | (3.7) | 540 | (3.4) | 2 540 | (15.2) | |||
Mormyrus | 40 | (0.3) | 20 | (0.2) | 240 | (1.5) | 240 | (1.5) | 130 | (0.8) | |||
Labeo | 10 | (0.1) | 10 | (0.1) | 30 | (0.2) | 30 | (0.2) | 40 | (0.2) | |||
Engraulicypris | 10 | (0.1) | 10 | (0.1) | 70 | (0.4) | |||||||
Total | 15 500 | 11 100 | 15 600 | 15 560 | 16 760 | 30 000 | 30 000 | 30 000 |
Source : CIFA (1983)
L. VICTORIA
DISTRIBUTION OF THE DIFFERENT TYPES OF FISHING GEAR USED BY A SAMPLE OF FISHING VESSELS
Country | Types of fishing gear used/No. of fishing vessels | |||||||||||||||||
Gillnets only | Seine nets only | Traps only | Hooks only | “Dagaa” nets only | Gillnets and hooks | Seine nets and hooks | Gillnets and Seine nets | Total No. of fishing vessels | ||||||||||
No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | |
Tanzania | 45 | 73 | 7 | 11 | - | - | 6 | 10 | 3 | 5 | 1 | 1 | - | - | - | - | 62 | 100 |
Uganda | 56 | 66 | 5 | 6 | - | - | 10 | 12 | - | - | 13 | 15 | 1 | - | - | 85 | 100 | |
Kenya | 94 | 64 | 12 | 8 | - | - | 20 | 14 | 2 | 1 | 12 | 8 | - | - | 5 | 4 | 145 | 100 |
Total | 195 | 66 | 24 | 8 | - | - | 36 | 12 | 5 | 2 | 26 | 9 | 1 | 1 | 5 | 2 | 292 | 100 |
Source : Butcher and Colaris (1975)
L. VICTORIA - TOTAL NOMINAL CATCHES OF THE ARTISANAL FISHERIES BY COUNTRY, 1968–1979
Years | ||||||||||||
1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | |
Kenya | 16 400 | 17 400 | 16 400 | 14 900 | 16 000 | 16 800 | 17 200 | 16 300 | 18 700 | 19 300 | 23 900 | 30 600 |
Tanzania | 59 400 | 53 900 | 48 300 | 42 600 | 40 900 | 49 600 | 41 700 | 46 600 | 50 600 | 65 400 | 46 500 | 55 100 |
Uganda | 40 500 | 41 200 | 34 800 | 38 100 | 33 900 | 32 500 | 30 000a | 30 000a | 30 000a | 30 000a | 30 000a | 30 000a |
Total | 116 300 | 112 500 | 99 500 | 95 600 | 90 800 | 98 900 | 88 900 | 92 900 | 99 300 | 114 700 | 100 400 | 115 700 |
Source : CIFA (1982)
Figure 4.1 Percentage species composition (by weight) of various species in trawl and commercial gillnet catches for the northern part of the Uganda sector of Lake Victoria for the period 1981–1983 (S. esculentus = O. esculentus; S. variabilis = O. variabilis; S. niloticus = O. niloticus; and S. leucostictus = O. leucostictus)
Source : Okaronon et al. (1984)